swab()
QNX SDP8.0C Library ReferenceAPIDeveloper
Endian-swap a given number of bytes
Synopsis:
#include <unistd.h>
void swab( const void * src,
void * dest,
ssize_t nbytes );
Arguments:
- src
- A pointer to the buffer that you want to copy the bytes from.
- dest
- A pointer to the buffer where you want the function to copy the bytes.
- nbytes
- The number of bytes that you want to copy and swap.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The swab() function copies nbytes bytes, pointed to by src, to the object pointed to by dest, exchanging adjacent bytes. The nbytes argument should be even:
- If nbytes is odd, swab() copies and exchanges nbytes-1 bytes. What happens to the last byte is undefined.
- If nbytes is negative, swab() does nothing.
If copying takes place between objects that overlap, the behavior is undefined.
Classification:
| Safety: | |
|---|---|
| Cancellation point | No |
| Signal handler | Yes |
| Thread | Yes |
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